manta ray/sea krait
Commonly understood to be the office pushover. Incredibly low self-esteem, spineless wimp, sucks up to everyone in what he thinks is self-defense but usually it just makes his life harder.
Hates nonsense from others, but prone to sycophantic behavior himself.
Harbors a huge inferiority complex and tons of misplaced anger/resentment.
Weak point: Sincerity.